US5326496A
Expired / Lapsed
US
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Compensator for liquid crystal display
Assignee: Ricoh Co Ltd
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Filing: 1993-11-08
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Granted: 1994-07-05
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Expires: 2013-11-08
Abstract
Abstract A compensator for liquid crystal display which is composed of: a light transmitting base; an alignment layer formed on said base; and a film formed on said alignment layer by a liquid crystalline polymer which exhibits a twisted nematic orientation in the state of liquid crystal and which assumes the state of glass at a temperature below the liquid crystal transition point thereof.
Inventors
- 👤 Shigeki Iida
- 👤 Takehiro Toyooka
- 👤 Yasuyuki Takiguchi
- 👤 Takamichi Enomoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:29
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3804; C09K19/3809; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F1/133633; G02F2413/00; G02F2413/01; G02F2413/08; G02F2413/15
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
162 words
A compensator for liquid crystal display, comprising: a light transmitting base; an alignment layer formed on said base; and a film formed on said alignment layer by a liquid crystalline polymer which exhibits a twisted nematic orientation in the state of liquid crystal and which assumes the state of glass at a temperature below the liquid crystal transition point thereof, said liquid crystalline polymer being (1) (a) an optically active main chain type liquid crystalline polymer selected from the group consisting of polyesters, polyamides, polycarbonates and polyesterimides, or (b) an optically active side chain type liquid crystalline polymer selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, or (2) (a) a main chain type liquid crystalline polymer selected from the group consisting of polyesters, polyamides, polycarbonates and polyesterimides, in combination with an optically active compound, or (b) a side chain type liquid crystalline polymer selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, in combination with an optically active compound.
Claim 2
Dependent Claim
162 words
A compensator for liquid crystal display, comprising: a light transmitting base; an alignment layer formed on said base; and a film formed on said alignment layer by a liquid crystalline polymer which exhibits a twisted nematic orientation in the state of liquid crystal and which assumes the state of glass at a temperature below the liquid crystal transition point thereof, said liquid crystalline polymer being (1) (a) an optically active main chain type liquid crystalline polymer selected from the group consisting of polyesters, polyamides, polycarbonates and polyesterimides, or (b) an optically active side chain type liquid crystalline polymer selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, or (2) (a) a main chain type liquid crystalline polymer selected from the group consisting of polyesters, polyamides, polycarbonates and polyesterimides, in combination with an optically active compound, or (b) a side chain type liquid crystalline polymer selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, in combination with an optically active compound.
Claim 3
Dependent Claim
27 words
A compensator for liquid crystal display as set forth in claim 1, wherein said liquid crystalline polymer is an optically active polyester containing an ortho-substituted aromatic unit.
Claim 4
Dependent Claim
50 words
A compensator for liquid crystal display, comprising: a light transmitting base; an alignment layer formed on said base; and a liquid crystalline polymer film formed on said alignment layer, said liquid crystalline polymer film containing as a main component a polyester which contains an ortho-substituted aromatic unit as a constituent.
Claim 5
Dependent Claim
50 words
A compensator for liquid crystal display, comprising: a light transmitting base; an alignment layer formed on said base; and a liquid crystalline polymer film formed on said alignment layer, said liquid crystalline polymer film containing as a main component a polyester which contains an ortho-substituted aromatic unit as a constituent.
Claim 6
Dependent Claim
43 words
A compensator for liquid crystal display as set forth in claim 3, wherein said liquid crystalline polymer film is formed by a liquid crystalline polymer composition comprising a polyester which contains an ortho-substituted aromatic unit as a constituent and an optically active compound.
Claim 7
Dependent Claim
25 words
A compensator for liquid crystal display as set forth in claim 4, wherein said optically active compound is a polymer having an optically active group.
Claim 8
Dependent Claim
79 words
A compensator for STN liquid crystal display, having a film obtained by heat-treating an optically active polyester containing an ortho-substituted aromatic unit, or a composition containing a liquid crystalline polyester and an optically active compound which liquid crystalline polyester contains an ortho-substituted aromatic unit as a constituent, on an alignment layer at a temperature above the glass transition point of said polyester, followed by cooling to a temperature below said glass transition point to immobilize a twisted nematic structure.
Claim 9
Dependent Claim
79 words
A compensator for STN liquid crystal display, having a film obtained by heat-treating an optically active polyester containing an ortho-substituted aromatic unit, or a composition containing a liquid crystalline polyester and an optically active compound which liquid crystalline polyester contains an ortho-substituted aromatic unit as a constituent, on an alignment layer at a temperature above the glass transition point of said polyester, followed by cooling to a temperature below said glass transition point to immobilize a twisted nematic structure.
Claim 10
Dependent Claim
21 words
A compensator as set forth in claim 6, wherein said optically active compound is a polymer having an optically active group.
Claim 11
Dependent Claim
26 words
A compensator for liquid crystal display as set forth in claim 1, wherein said liquid crystal display is a super twisted nematic type liquid crystal display.
Claim 12
Dependent Claim
167 words
A compensator for liquid crystal display comprising: a light transmitting base; an alignment layer formed on said base; and a film formed on said alignment layer by a liquid crystalline polymer which exhibits a twisted nematic orientation in the state of liquid crystal and which assumes the state of glass at a temperature below the liquid crystal transition point thereof, thereby providing a black-and-white display, said liquid crystalline polymer being (1) (a) an optically active main chain type liquid crystalline polymer selected from the group consisting of polyesters, polyamides, polycarbonates and polyesterimides, or (b) an optically active side chain type liquid crystalline polymer selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, or (2) (a) a main chain type liquid crystalline polymer selected from the group consisting of polyesters polyamides, polycarbonates and polyesterimides, in combination with an optically active compound or (b) a side chain type liquid crystalline poller selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, in combination with an optically active compound.
Claim 13
Dependent Claim
167 words
A compensator for liquid crystal display comprising: a light transmitting base; an alignment layer formed on said base; and a film formed on said alignment layer by a liquid crystalline polymer which exhibits a twisted nematic orientation in the state of liquid crystal and which assumes the state of glass at a temperature below the liquid crystal transition point thereof, thereby providing a black-and-white display, said liquid crystalline polymer being (1) (a) an optically active main chain type liquid crystalline polymer selected from the group consisting of polyesters, polyamides, polycarbonates and polyesterimides, or (b) an optically active side chain type liquid crystalline polymer selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, or (2) (a) a main chain type liquid crystalline polymer selected from the group consisting of polyesters polyamides, polycarbonates and polyesterimides, in combination with an optically active compound or (b) a side chain type liquid crystalline poller selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, in combination with an optically active compound.
Claim 14
Dependent Claim
33 words
A compensator for liquid crystal display as set forth in claim 9, wherein said liquid crystalline polymer is an optically active polyester or a composition of a polyester and an optically active compound.
Claim 15
Dependent Claim
45 words
A compensator for liquid crystal display as set forth in claim 9, wherein said liquid crystalline polymer is an optically active polyester containing an ortho-substituted aromatic unit, or a composition of a liquid crystalline polyester containing an ortho-substituted aromatic unit and an optically active compound.
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